in IDLE Python:
opencv-python version: 4.11.0
OpenCV import/test failed: OpenCV(4.11.0) D:\a\opencv-python\opencv-python\opencv\modules\imgproc\src\color.cpp:199: error: (-215:Assertion failed) !_src.empty() in function ‘cv::cvtColor’
and what did you do?
what does the internet/AI say about the error in combination with the code?
im trying install and uninstall openCv using cmd prompt but still unsuccessful
this is the coding:
import sys
def print_version(name, module):
ver = getattr(module, ‘version’, None) or getattr(module, ‘VERSION’, None) or ‘unknown’
print(f"{name} version: {ver}")
1. numpy
try:
import numpy as np
print_version(‘numpy’, np)
a = np.arange(6).reshape(2,3)
print(“numpy test array:\n”, a)
except Exception as e:
print(“numpy import/test failed:”, e)
print()
2. OpenCV
try:
import cv2
print_version(‘opencv-python’, cv2)
# create a blank image and convert to grayscale and back
img = cv2.cvtColor(cv2.imread(cv2.file, 0), cv2.COLOR_GRAY2BGR)
print(“OpenCV read and color-conversion OK”)
except Exception as e:
print(“OpenCV import/test failed:”, e)
print()
3. Pillow
try:
from PIL import Image, ImageDraw, ImageFont
print_version(‘Pillow’, Image)
im = Image.new(‘RGB’, (100, 30), color=‘navy’)
d = ImageDraw.Draw(im)
d.text((10, 5), “OK”, fill=(255,255,0))
im.save(‘pillow_test.png’)
print(“Pillow created pillow_test.png”)
except Exception as e:
print(“Pillow import/test failed:”, e)
print()
4. pytesseract
try:
import pytesseract
print_version(‘pytesseract’, pytesseract)
# OCR blank image => should return empty or whitespace
text = pytesseract.image_to_string(Image.new(‘RGB’, (100,30), color=‘white’))
print(“pytesseract OCR on blank image:”, repr(text))
except Exception as e:
print(“pytesseract import/test failed:”, e)
print()
5. Flask
try:
import flask
print_version(‘Flask’, flask)
app = flask.Flask(name)
@app.route(‘/hello’)
def hello():
return ‘Hello, world!’
print(“Flask app created, route /hello defined”)
except Exception as e:
print(“Flask import/test failed:”, e)
print()
6. requests
try:
import requests
print_version(‘requests’, requests)
r = requests.get(‘https://httpbin.org/get’, timeout=5)
print(“requests GET httpbin.org status:”, r.status_code)
except Exception as e:
print(“requests import/test failed:”, e)
print()
7. APScheduler
try:
from apscheduler.schedulers.background import BackgroundScheduler
print_version(‘APScheduler’, BackgroundScheduler)
sched = BackgroundScheduler()
def f():
print(" [APScheduler job fired]")
sched.add_job(f, ‘interval’, seconds=1, id=‘test_job’)
sched.start()
print(“APScheduler scheduled a dummy job (will run once in 1 second)”)
import time
time.sleep(1.1)
sched.shutdown()
print(“APScheduler job ran and scheduler shut down”)
except Exception as e:
print(“APScheduler import/test failed:”, e)
print()
8. python-telegram-bot
try:
import telegram
print_version(‘python-telegram-bot’, telegram)
print(“telegram.Bot class is available:”, hasattr(telegram, ‘Bot’))
except Exception as e:
print(“python-telegram-bot import/test failed:”, e)
print()
9. pyserial
try:
import serial
print_version(‘pyserial’, serial)
# list ports if available
ports = [p.device for p in serial.tools.list_ports.comports()]
print(“pyserial detected ports:”, ports)
except Exception as e:
print(“pyserial import/test failed:”, e)
print()
print(“All tests done.”)